Cisco Cisco IPCC Web Option Design Guide
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Cisco Unified Contact Center Enterprise 7.0, 7.1, and 7.2 SRND
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Chapter 3 Design Considerations for High Availability
CTI OS Considerations
Figure 3-23
Redundant CTI Servers Co-Located on Agent PG
CTI OS Considerations
CTI OS Server is a software component that runs co-located on the Unified CM Peripheral Gateway. CTI
OS Server software is designed to be fault-tolerant and is typically deployed on redundant physical
servers; however, unlike the PG processes that run in hot-standby mode, both of the CTI OS Server
processes run in active mode all the time. The CTI OS Server processes are managed by NodeManager,
which monitors each process running as part of the CTI OS service and which automatically restarts
abnormally terminated processes.
OS Server software is designed to be fault-tolerant and is typically deployed on redundant physical
servers; however, unlike the PG processes that run in hot-standby mode, both of the CTI OS Server
processes run in active mode all the time. The CTI OS Server processes are managed by NodeManager,
which monitors each process running as part of the CTI OS service and which automatically restarts
abnormally terminated processes.
CTI OS handles failover of related components as described in the following scenarios (see
TDM
access
143951
Sub 1
Sub 2
Unified CM
cluster
MDF
switch 1
Call control, CTI data,
IP messaging
TDM voice lines
Ethernet lines
IP messaging
TDM voice lines
Ethernet lines
IP IVR 1
IP IVR 2
Agent PG
CTI Server
A
IP IVR
group
Publisher
VRU
PG A
VRU
PG B
AW
A
AW
B
WedView
Reporting Client
ICM A
ICM B
ICM central controllers
Agent PG
CTI Server
B
M
Public
network
V
IDF
switch 1
IDF
switch 2
V
Voice
gateway 1
Voice
gateway 2
T1 lines
Gatekeepers
T1 lines
Corporate
LAN
Firewall
M
M
MDF
switch 2
switch 2
Unified CCE Site